Hi Bean, > > The -Wstringop-truncation warning added in GCC 8.0: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82944 > > If you use the GCC > v8.0, you probably will get this compilation error: > > error: ‘__builtin_strncpy’ output may be truncated copying 8 bytes from a > string of length 511 [-Werror=stringop-truncation] > > Use memcpy instead of strncpy to avoid this compilation error. > > Signed-off-by: Bean Huo <beanhuo@xxxxxxxxxx> Looking into the link above, it say that this warning: "... is specifically intended to highlight likely unintended uses of the strncpy function that truncate the terminating NUL charcter from the source string." As this is not the case here, I wouldn't worry about this warning. Thanks, Avri > --- > mmc_cmds.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/mmc_cmds.c b/mmc_cmds.c > index 205e6e5b89f9..ecbde3937c81 100644 > --- a/mmc_cmds.c > +++ b/mmc_cmds.c > @@ -1835,7 +1835,8 @@ int do_read_extcsd(int nargs, char **argv) > > if (ext_csd_rev >= 7) { > memset(lbuf, 0, sizeof(lbuf)); > - strncpy(lbuf, (char*)&ext_csd[EXT_CSD_FIRMWARE_VERSION], 8); > + memcpy(lbuf, (char*)&ext_csd[EXT_CSD_FIRMWARE_VERSION], 8); > + lbuf[8] = '\0'; > printf("eMMC Firmware Version: %s\n", lbuf); > printf("eMMC Life Time Estimation A > [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]: 0x%02x\n", > ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]); > -- > 2.25.1
